The function of the Blue alarm is that something is deteriorating and will eventually go to Red if interaction is not taken to correct a problem. Blue indicates that no single customer is currently out of service but warns that they might if another failure occurs.
Example: Circuit A fails but is automatically switched to a protection spare. Blue says that if Circuit B fails there will be no protection spare since A and B share the same protection circuit. Circuit A must be restored to get rid of the Blue alarm. In older systems Yellow was used for this function. Yellow is different in that the alarm indicates that the particular circuitry associated with the yellow alarm is actually out of service. In this case Circuit A would be Yellow. 2nd Example: A bit error rate or severely errors seconds alarm could be defined as a Blue Alarm if the degradation is not enough to be defined as out of service. I am looking for the official description(s) but have not yet found it. Don Don Robert House, SMTS Product Certification & Regulatory Compliance Excelsus Technologies, Inc. 2875 Loker Avenue East Carlsbad, CA 92008-6626 USA (760) 918-2552 Office/Lab (760) 476-1519 FAX URL: http://www.excelsus-tech.com -----Original Message----- From: David Spencer [mailto:dspen...@oresis.com] Sent: Monday, January 22, 2001 11:04 AM To: 'nebs@world.std.com'; 'emc-p...@ieee.org' Cc: 't...@world.std.com' Subject: RE: NEBS/telco LED alarm color Hi Dwight, >From GR499:Dec 1995: " R12-2 [313] The following color conventions shall be adhered to: RED To indicate critical or major failure, error, or danger YELLOW To indicate a minor failure, caution, warning, or temporary malfunction GREEN To indicate satisfactory operation, completion of a process,or proceed WHITE To indicate a neutral condition that implies nothing about the success or failure of system operations (e.g., status of a switch). " Have a Great Day! Dave Spencer Oresis Communications -----Original Message----- From: Dwight Hunnicutt [mailto:dwight.hunnic...@vina-tech.com] Sent: Monday, January 22, 2001 9:51 AM To: 'emc-p...@ieee.org' Cc: 't...@world.std.com'; 'nebs@world.std.com' Subject: NEBS/telco LED alarm color All- Our system test guys are concerned that we don't vary our T1 card indicator LED color to distinguish between minor, major, and critical alarms. I recall a Bellcore spec that says we have to do this. Can anyone help me track down the spec reference for this? thanks Dwight
